The last movie I watched was Logan for like the third to sixth time. I'm still pissed off at trees, damn it. Yes, I know the adamantium had poisoned him. The tree didn't need to stab him. Fucking thing, what was it doing there anyway? I set and figured, if you follow Marvel Comics logic Wolverine is/was well over 500 years old.
He was around for the Quasi-war which was in 1798, fought in both the Spanish & Mexican American wars. Then, finally dies in 2019. This is only 221 years but a person needs to consider there was time for his youth when he left with Sabertooth.
That time period though hinted at is never really pinned down. Though in the late 15th century the French and British were colonizing Canada. This gives another 200 years at least and Logan appears as a boy of possibly 8-12 years old. This still seems short of the 500 years until you figure Logan's healing ability also stunted his aging. 100 years to us might seem a year to him.
This is how I figured he's at least 500 years old or more. I know that might seem a bit obsessive for a fictional character. Then I also consider that had I not got put on hormone treatment I would have not aged, been impervious to toxins inclusive of exhaustion, like Wolverine. How far is it to then wonder, maybe Marvel based a fiction off something real? That's why the character Logan holds a place dear for me.